Biggest cam for stock timing chain
#1
Biggest cam for stock timing chain
Hello
I install a new cam in my 1989 Iroc-Z with 305 TPI engine.
What are the parameters of the cam where you cannot use the stock timing chain ? I ask this question because the change is expensive (Timing set 100$, Timing Cover 80$, problems with water pump clearance, ...)
Thanks
I install a new cam in my 1989 Iroc-Z with 305 TPI engine.
What are the parameters of the cam where you cannot use the stock timing chain ? I ask this question because the change is expensive (Timing set 100$, Timing Cover 80$, problems with water pump clearance, ...)
Thanks
#2
Re: Biggest cam for stock timing chain
Hello
I install a new cam in my 1989 Iroc-Z with 305 TPI engine.
What are the parameters of the cam where you cannot use the stock timing chain ? I ask this question because the change is expensive (Timing set 100$, Timing Cover 80$, problems with water pump clearance, ...)
Thanks
I install a new cam in my 1989 Iroc-Z with 305 TPI engine.
What are the parameters of the cam where you cannot use the stock timing chain ? I ask this question because the change is expensive (Timing set 100$, Timing Cover 80$, problems with water pump clearance, ...)
Thanks
Also you will have no water pump issues because of the factory hydraulic roller having a block mounted retainer plate. This eliminates the need for a cam button, therefore no water pump clearance issues.
As for cam selection go small because a stock tpi 305 intake will only make power to 5300 rpm or so. A zz4 take out cam is a good choice for cheap, a small lunati voodoo cam would work well also.
https://www.lunatipower.com/Product.aspx?id=1987&gid=289
You will need the valve springs to match whatever cam you decide to choose.
Keep the lsa at 112-114
Duration at .050 no larger than 225-226
Lift will be below .550 with 1.5 rockers
Roller tip rockers will be fine 1.5 or 1.6int/1.5 exh ratio
Pcmforless for the tune.
Headers and a 3 inch mandrel exhaust need to happen before a cam is upgraded if not already done so.
When in doubt search on here for info.
#3
Supreme Member
Re: Biggest cam for stock timing chain
Timing sets at Jegs from under $50, Edelbrock for just over $50. Money well spent. Stock chain in good shape would probably do the job though.
#4
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Biggest cam for stock timing chain
Single roller GMPP chain for engines like the ZZ4 and ZZ383 are only $50 and fit under the stock cover.
#5
#6
Re: Biggest cam for stock timing chain
I take the CompCam 08-501-8 with 212 int./218 exh at 0,05 and 0,495lift.
I hope this cam is not to small, but i want the torque curve to be high at low to mid rpms.
I hope this cam is not to small, but i want the torque curve to be high at low to mid rpms.
#7